369 [18F]FDG-PET/CT: cost-utility analysis alongside an RCT 6 Figure 2. Markov tree The Markov tree visualizes the health states (ovals), possible transitions between health states after each one-year cycle length (arrows), treatments (boxes), and decisions (diamonds) that patients may encounter in the Markov model. Patients enter the model in their actual health state at the end of the first year. Pink shaded fields and corresponding transitions only apply to patients with malignancy; all white fields and corresponding transitions apply to patients with either benign or malignant lesions, although different (transition) probabilities, costs, and utilities may apply as presented in Tables 2 and 3. cTT, completing total thyroidectomy. HT, hemithyroidectomy. RAI, radioiodine ablative therapy. TT, total thyroidectomy.
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